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利用厌氧折流板反应器(ABR)与改良SBR联用工艺处理模拟畜禽养殖废水,旨在揭示厌氧过程中氨化现象的影响因素及其规律。试验中所处理的废水是人工模拟畜禽养殖废水,该类废水含有大量的有机物,特别是蛋白质等含氮化合物,COD从1 000～10 000 mg/L逐渐增大,相应地氨氮质量浓度范围为78.6～773.2 mg/L。研究了ABR的启动过程中水力停留时间(HRT)、pH值、温度以及进水氨氮浓度等因素对氨化的影响。结果表明,HRT是一个重要的因素,很大程度地影响其他因素的研究,16 h为峰值点;氨化菌在pH值为6.5～8.0的范围可以保持一定活性,其中以pH=7.0为最佳点;随着温度升高,氨化菌活性提高,氨化率也随之提高,33℃为最佳温度,但ABR对温度的敏感性不是很高,考虑经济原因,可以在25℃运行;氨化率随进水氨氮浓度的增加而减小。最佳氨化率条件是HRT=16 h,pH=7.0,T=25℃,此时进水COD为10 000 mg/L。
The use of anaerobic baffled reactor (ABR) combined with an improved SBR process to treat simulated livestock and poultry wastewater was designed to reveal the influencing factors and regularities of ammonification in anaerobic processes. The waste water treated in the experiment was simulated artificial livestock and poultry breeding wastewater, which contained a large amount of organic compounds, especially nitrogen compounds such as proteins. The COD gradually increased from 1000 to 10 000 mg / L, corresponding to the ammonia concentration range 78.6 ~ 773.2 mg / L. The effects of hydraulic retention time (HRT), pH, temperature and ammonia nitrogen concentration on the ammoniation of ABR were studied. The results showed that HRT was an important factor that greatly affected the other factors, with a peak value of 16 h. The activity of ammonifying bacteria in the pH range of 6.5-8.0 could be maintained, of which pH = 7.0 was the most Good point; as the temperature increases, ammonifier activity increased, the ammoniation rate also increased, 33 ℃ for the best temperature, but the sensitivity of the ABR temperature is not very high, for economic reasons, you can run at 25 ℃ ; Ammonification rate decreased with the increase of ammonia nitrogen concentration. The optimal conditions for the ammoniation rate are HRT = 16 h, pH = 7.0, T = 25 ℃, and influent COD is 10 000 mg / L.